5 #include <linux/module.h>
6 #include <linux/proc_fs.h>
7 #include <linux/sched.h>
8 #include <linux/timex.h>
9 #include <linux/wbias-rwlock.h>
10 #include <linux/kthread.h>
11 #include <linux/delay.h>
12 #include <linux/hardirq.h>
13 #include <linux/module.h>
14 #include <linux/percpu.h>
15 #include <linux/spinlock.h>
16 #include <asm/ptrace.h>
18 /* Test with no contention duration, in seconds */
19 #define SINGLE_WRITER_TEST_DURATION 10
20 #define SINGLE_READER_TEST_DURATION 10
21 #define MULTIPLE_READERS_TEST_DURATION 10
23 /* Test duration, in seconds */
24 #define TEST_DURATION 60
28 #define NR_TRYLOCK_WRITERS 1
30 #define NR_NPREADERS 2
31 #define NR_TRYLOCK_READERS 1
34 * 1 : test standard rwlock
35 * 0 : test wbiasrwlock
37 #define TEST_STD_RWLOCK 0
40 * 1 : test with thread and interrupt readers.
41 * 0 : test only with thread readers.
43 #define TEST_INTERRUPTS 1
46 #define NR_INTERRUPT_READERS 1
47 #define NR_TRYLOCK_INTERRUPT_READERS 1
49 #define NR_INTERRUPT_READERS 0
50 #define NR_TRYLOCK_INTERRUPT_READERS 0
54 * Writer iteration delay, in us. 0 for busy loop. Caution : writers can
57 #define WRITER_DELAY 100
58 #define TRYLOCK_WRITER_DELAY 1000
61 * Number of iterations after which a trylock writer fails.
62 * -1 for infinite loop.
64 #define TRYLOCK_WRITERS_FAIL_ITER 100
66 /* Thread and interrupt reader delay, in ms */
67 #define THREAD_READER_DELAY 0 /* busy loop */
68 #define INTERRUPT_READER_DELAY 100
70 static int var
[NR_VARS
];
71 static struct task_struct
*preader_threads
[NR_PREADERS
];
72 static struct task_struct
*npreader_threads
[NR_NPREADERS
];
73 static struct task_struct
*trylock_reader_threads
[NR_TRYLOCK_READERS
];
74 static struct task_struct
*writer_threads
[NR_WRITERS
];
75 static struct task_struct
*trylock_writer_threads
[NR_TRYLOCK_WRITERS
];
76 static struct task_struct
*interrupt_reader
[NR_INTERRUPT_READERS
];
77 static struct task_struct
*trylock_interrupt_reader
[NR_TRYLOCK_INTERRUPT_READERS
];
81 static DEFINE_RWLOCK(std_rw_lock
);
83 #define wrap_read_lock() read_lock(&std_rw_lock)
84 #define wrap_read_trylock() read_trylock(&std_rw_lock)
85 #define wrap_read_unlock() read_unlock(&std_rw_lock)
87 #define wrap_read_lock_inatomic() read_lock(&std_rw_lock)
88 #define wrap_read_trylock_inatomic() read_trylock(&std_rw_lock)
89 #define wrap_read_unlock_inatomic() read_unlock(&std_rw_lock)
91 #define wrap_read_lock_irq() read_lock(&std_rw_lock)
92 #define wrap_read_trylock_irq() read_trylock(&std_rw_lock)
93 #define wrap_read_unlock_irq() read_unlock(&std_rw_lock)
96 #define wrap_write_lock() write_lock_irq(&std_rw_lock)
97 #define wrap_write_unlock() write_unlock_irq(&std_rw_lock)
99 #define wrap_write_lock() write_lock(&std_rw_lock)
100 #define wrap_write_unlock() write_unlock(&std_rw_lock)
105 static DEFINE_WBIAS_RWLOCK(wbiasrwlock
);
107 #define wrap_read_lock() wbias_read_lock(&wbiasrwlock)
108 #define wrap_read_trylock() wbias_read_trylock(&wbiasrwlock)
109 #define wrap_read_unlock() wbias_read_unlock(&wbiasrwlock)
111 #define wrap_read_lock_inatomic() wbias_read_lock_inatomic(&wbiasrwlock)
112 #define wrap_read_trylock_inatomic() \
113 wbias_read_trylock_inatomic(&wbiasrwlock)
114 #define wrap_read_unlock_inatomic() \
115 wbias_read_unlock_inatomic(&wbiasrwlock)
117 #define wrap_read_lock_irq() wbias_read_lock_irq(&wbiasrwlock)
118 #define wrap_read_trylock_irq() wbias_read_trylock_irq(&wbiasrwlock)
119 #define wrap_read_unlock_irq() wbias_read_unlock_irq(&wbiasrwlock)
121 #if (TEST_INTERRUPTS)
122 #define wrap_write_lock() wbias_write_lock_irq(&wbiasrwlock)
123 #define wrap_write_unlock() wbias_write_unlock_irq(&wbiasrwlock)
125 #define wrap_write_lock() wbias_write_lock(&wbiasrwlock)
126 #define wrap_write_unlock() wbias_write_unlock(&wbiasrwlock)
131 static cycles_t cycles_calibration_min
,
132 cycles_calibration_avg
,
133 cycles_calibration_max
;
135 static inline cycles_t
calibrate_cycles(cycles_t cycles
)
137 return cycles
- cycles_calibration_avg
;
140 struct proc_dir_entry
*pentry
= NULL
;
142 static int p_or_np_reader_thread(void *data
, int preemptable
)
146 unsigned long iter
= 0;
147 cycles_t time1
, time2
, delay
, delaymax
= 0, delaymin
= ULLONG_MAX
,
150 printk("reader_thread/%lu runnning\n", (unsigned long)data
);
156 time1
= get_cycles();
160 wrap_read_lock_inatomic();
165 time2
= get_cycles();
167 delay
= time2
- time1
;
168 delaymax
= max(delaymax
, delay
);
169 delaymin
= min(delaymin
, delay
);
172 for (i
= 1; i
< NR_VARS
; i
++) {
176 "Unequal cur %d/prev %d at i %d, iter %lu "
177 "in thread\n", cur
, prev
, i
, iter
);
181 wrap_read_unlock_inatomic();
186 if (THREAD_READER_DELAY
)
187 msleep(THREAD_READER_DELAY
);
188 } while (!kthread_should_stop());
190 printk("reader_thread/%lu iterations : %lu",
191 (unsigned long)data
, iter
);
194 printk("reader_thread/%lu iterations : %lu, "
195 "lock delay [min,avg,max] %llu,%llu,%llu cycles\n",
196 (unsigned long)data
, iter
,
197 calibrate_cycles(delaymin
),
198 calibrate_cycles(delayavg
),
199 calibrate_cycles(delaymax
));
204 static int preader_thread(void *data
)
206 return p_or_np_reader_thread(data
, 1);
209 static int npreader_thread(void *data
)
211 return p_or_np_reader_thread(data
, 0);
214 static int trylock_reader_thread(void *data
)
218 unsigned long iter
= 0, success_iter
= 0;
220 printk("trylock_reader_thread/%lu runnning\n", (unsigned long)data
);
222 while (!wrap_read_trylock())
226 for (i
= 1; i
< NR_VARS
; i
++) {
230 "Unequal cur %d/prev %d at i %d, iter %lu "
231 "in thread\n", cur
, prev
, i
, iter
);
234 if (THREAD_READER_DELAY
)
235 msleep(THREAD_READER_DELAY
);
236 } while (!kthread_should_stop());
237 printk("trylock_reader_thread/%lu iterations : %lu, "
238 "successful iterations : %lu\n",
239 (unsigned long)data
, iter
, success_iter
);
243 DEFINE_PER_CPU(cycles_t
, int_delaymin
);
244 DEFINE_PER_CPU(cycles_t
, int_delayavg
);
245 DEFINE_PER_CPU(cycles_t
, int_delaymax
);
246 DEFINE_PER_CPU(cycles_t
, int_ipi_nr
);
248 static void interrupt_reader_ipi(void *data
)
252 cycles_t time1
, time2
;
253 cycles_t
*delaymax
, *delaymin
, *delayavg
, *ipi_nr
, delay
;
256 * Skip the ipi caller, not in irq context.
261 delaymax
= &per_cpu(int_delaymax
, smp_processor_id());
262 delaymin
= &per_cpu(int_delaymin
, smp_processor_id());
263 delayavg
= &per_cpu(int_delayavg
, smp_processor_id());
264 ipi_nr
= &per_cpu(int_ipi_nr
, smp_processor_id());
267 time1
= get_cycles();
270 wrap_read_lock_irq();
273 time2
= get_cycles();
275 delay
= time2
- time1
;
276 *delaymax
= max(*delaymax
, delay
);
277 *delaymin
= min(*delaymin
, delay
);
281 for (i
= 1; i
< NR_VARS
; i
++) {
285 "Unequal cur %d/prev %d at i %d in interrupt\n",
288 wrap_read_unlock_irq();
291 DEFINE_PER_CPU(unsigned long, trylock_int_iter
);
292 DEFINE_PER_CPU(unsigned long, trylock_int_success
);
294 static void trylock_interrupt_reader_ipi(void *data
)
300 * Skip the ipi caller, not in irq context.
305 per_cpu(trylock_int_iter
, smp_processor_id())++;
306 while (!wrap_read_trylock_irq())
307 per_cpu(trylock_int_iter
, smp_processor_id())++;
308 per_cpu(trylock_int_success
, smp_processor_id())++;
310 for (i
= 1; i
< NR_VARS
; i
++) {
314 "Unequal cur %d/prev %d at i %d in interrupt\n",
317 wrap_read_unlock_irq();
321 static int interrupt_reader_thread(void *data
)
323 unsigned long iter
= 0;
326 for_each_online_cpu(i
) {
327 per_cpu(int_delaymax
, i
) = 0;
328 per_cpu(int_delaymin
, i
) = ULLONG_MAX
;
329 per_cpu(int_delayavg
, i
) = 0;
330 per_cpu(int_ipi_nr
, i
) = 0;
334 on_each_cpu(interrupt_reader_ipi
, NULL
, 0);
335 if (INTERRUPT_READER_DELAY
)
336 msleep(INTERRUPT_READER_DELAY
);
337 } while (!kthread_should_stop());
338 printk("interrupt_reader_thread/%lu iterations : %lu\n",
339 (unsigned long)data
, iter
);
340 for_each_online_cpu(i
) {
341 if (!per_cpu(int_ipi_nr
, i
))
343 per_cpu(int_delayavg
, i
) /= per_cpu(int_ipi_nr
, i
);
344 printk("interrupt readers on CPU %i, "
345 "lock delay [min,avg,max] %llu,%llu,%llu cycles\n",
347 calibrate_cycles(per_cpu(int_delaymin
, i
)),
348 calibrate_cycles(per_cpu(int_delayavg
, i
)),
349 calibrate_cycles(per_cpu(int_delaymax
, i
)));
354 static int trylock_interrupt_reader_thread(void *data
)
356 unsigned long iter
= 0;
361 on_each_cpu(trylock_interrupt_reader_ipi
, NULL
, 0);
362 if (INTERRUPT_READER_DELAY
)
363 msleep(INTERRUPT_READER_DELAY
);
364 } while (!kthread_should_stop());
365 printk("trylock_interrupt_reader_thread/%lu iterations : %lu\n",
366 (unsigned long)data
, iter
);
367 for_each_online_cpu(i
) {
368 printk("trylock interrupt readers on CPU %i, "
370 "successful iterations : %lu\n",
371 i
, per_cpu(trylock_int_iter
, i
),
372 per_cpu(trylock_int_success
, i
));
373 per_cpu(trylock_int_iter
, i
) = 0;
374 per_cpu(trylock_int_success
, i
) = 0;
379 static int writer_thread(void *data
)
383 unsigned long iter
= 0;
384 cycles_t time1
, time2
, delay
, delaymax
= 0, delaymin
= ULLONG_MAX
,
387 printk("writer_thread/%lu runnning\n", (unsigned long)data
);
390 //preempt_disable(); /* for get_cycles accuracy */
392 time1
= get_cycles();
398 time2
= get_cycles();
400 delay
= time2
- time1
;
401 delaymax
= max(delaymax
, delay
);
402 delaymin
= min(delaymin
, delay
);
404 new = (int)get_cycles();
405 for (i
= 0; i
< NR_VARS
; i
++) {
411 //preempt_enable(); /* for get_cycles accuracy */
412 if (WRITER_DELAY
> 0)
413 udelay(WRITER_DELAY
);
414 } while (!kthread_should_stop());
416 printk("writer_thread/%lu iterations : %lu, "
417 "lock delay [min,avg,max] %llu,%llu,%llu cycles\n",
418 (unsigned long)data
, iter
,
419 calibrate_cycles(delaymin
),
420 calibrate_cycles(delayavg
),
421 calibrate_cycles(delaymax
));
425 #if (TEST_STD_RWLOCK)
426 static int trylock_writer_thread(void *data
)
430 unsigned long iter
= 0, success
= 0, fail
= 0;
432 printk("trylock_writer_thread/%lu runnning\n", (unsigned long)data
);
434 #if (TEST_INTERRUPTS)
435 /* std write trylock cannot disable interrupts. */
439 #if (TRYLOCK_WRITERS_FAIL_ITER == -1)
442 if (write_trylock(&std_rw_lock
))
446 for (i
= 0; i
< TRYLOCK_WRITERS_FAIL_ITER
; i
++) {
448 if (write_trylock(&std_rw_lock
))
453 #if (TEST_INTERRUPTS)
459 new = (int)get_cycles();
460 for (i
= 0; i
< NR_VARS
; i
++) {
463 #if (TEST_INTERRUPTS)
464 write_unlock_irq(&std_rw_lock
);
466 write_unlock(&std_rw_lock
);
469 if (TRYLOCK_WRITER_DELAY
> 0)
470 udelay(TRYLOCK_WRITER_DELAY
);
471 } while (!kthread_should_stop());
472 printk("trylock_writer_thread/%lu iterations : "
473 "[try,success,fail after %d try], "
475 (unsigned long)data
, TRYLOCK_WRITERS_FAIL_ITER
,
476 iter
, success
, fail
);
480 #else /* !TEST_STD_RWLOCK */
482 static int trylock_writer_thread(void *data
)
486 unsigned long iter
= 0, success
= 0, fail
= 0;
488 printk("trylock_writer_thread/%lu runnning\n", (unsigned long)data
);
491 #if (TEST_INTERRUPTS)
492 if (wbias_write_trylock_irq_else_subscribe(&wbiasrwlock
))
494 if (wbias_write_trylock_else_subscribe(&wbiasrwlock
))
498 #if (TRYLOCK_WRITERS_FAIL_ITER == -1)
501 #if (TEST_INTERRUPTS)
502 if (wbias_write_trylock_irq_subscribed(&wbiasrwlock
))
504 if (wbias_write_trylock_subscribed(&wbiasrwlock
))
509 for (i
= 0; i
< TRYLOCK_WRITERS_FAIL_ITER
- 1; i
++) {
511 #if (TEST_INTERRUPTS)
512 if (wbias_write_trylock_irq_subscribed(&wbiasrwlock
))
514 if (wbias_write_trylock_subscribed(&wbiasrwlock
))
520 wbias_write_unsubscribe(&wbiasrwlock
);
524 new = (int)get_cycles();
525 for (i
= 0; i
< NR_VARS
; i
++) {
528 #if (TEST_INTERRUPTS)
529 wbias_write_unlock_irq(&wbiasrwlock
);
531 wbias_write_unlock(&wbiasrwlock
);
534 if (TRYLOCK_WRITER_DELAY
> 0)
535 udelay(TRYLOCK_WRITER_DELAY
);
536 } while (!kthread_should_stop());
537 printk("trylock_writer_thread/%lu iterations : "
538 "[try,success,fail after %d try], "
540 (unsigned long)data
, TRYLOCK_WRITERS_FAIL_ITER
,
541 iter
, success
, fail
);
545 #endif /* TEST_STD_RWLOCK */
547 static void wbias_rwlock_create(void)
551 for (i
= 0; i
< NR_PREADERS
; i
++) {
552 printk("starting preemptable reader thread %lu\n", i
);
553 preader_threads
[i
] = kthread_run(preader_thread
, (void *)i
,
554 "wbiasrwlock_preader");
555 BUG_ON(!preader_threads
[i
]);
558 for (i
= 0; i
< NR_NPREADERS
; i
++) {
559 printk("starting non-preemptable reader thread %lu\n", i
);
560 npreader_threads
[i
] = kthread_run(npreader_thread
, (void *)i
,
561 "wbiasrwlock_npreader");
562 BUG_ON(!npreader_threads
[i
]);
565 for (i
= 0; i
< NR_TRYLOCK_READERS
; i
++) {
566 printk("starting trylock reader thread %lu\n", i
);
567 trylock_reader_threads
[i
] = kthread_run(trylock_reader_thread
,
568 (void *)i
, "wbiasrwlock_trylock_reader");
569 BUG_ON(!trylock_reader_threads
[i
]);
571 for (i
= 0; i
< NR_INTERRUPT_READERS
; i
++) {
572 printk("starting interrupt reader %lu\n", i
);
573 interrupt_reader
[i
] = kthread_run(interrupt_reader_thread
,
575 "wbiasrwlock_interrupt_reader");
577 for (i
= 0; i
< NR_TRYLOCK_INTERRUPT_READERS
; i
++) {
578 printk("starting trylock interrupt reader %lu\n", i
);
579 trylock_interrupt_reader
[i
] =
580 kthread_run(trylock_interrupt_reader_thread
,
581 (void *)i
, "wbiasrwlock_trylock_interrupt_reader");
583 for (i
= 0; i
< NR_WRITERS
; i
++) {
584 printk("starting writer thread %lu\n", i
);
585 writer_threads
[i
] = kthread_run(writer_thread
, (void *)i
,
586 "wbiasrwlock_writer");
587 BUG_ON(!writer_threads
[i
]);
589 for (i
= 0; i
< NR_TRYLOCK_WRITERS
; i
++) {
590 printk("starting trylock writer thread %lu\n", i
);
591 trylock_writer_threads
[i
] = kthread_run(trylock_writer_thread
,
592 (void *)i
, "wbiasrwlock_trylock_writer");
593 BUG_ON(!trylock_writer_threads
[i
]);
597 static void wbias_rwlock_stop(void)
601 for (i
= 0; i
< NR_WRITERS
; i
++)
602 kthread_stop(writer_threads
[i
]);
603 for (i
= 0; i
< NR_TRYLOCK_WRITERS
; i
++)
604 kthread_stop(trylock_writer_threads
[i
]);
605 for (i
= 0; i
< NR_NPREADERS
; i
++)
606 kthread_stop(npreader_threads
[i
]);
607 for (i
= 0; i
< NR_PREADERS
; i
++)
608 kthread_stop(preader_threads
[i
]);
609 for (i
= 0; i
< NR_TRYLOCK_READERS
; i
++)
610 kthread_stop(trylock_reader_threads
[i
]);
611 for (i
= 0; i
< NR_INTERRUPT_READERS
; i
++)
612 kthread_stop(interrupt_reader
[i
]);
613 for (i
= 0; i
< NR_TRYLOCK_INTERRUPT_READERS
; i
++)
614 kthread_stop(trylock_interrupt_reader
[i
]);
618 static void perform_test(const char *name
, void (*callback
)(void))
620 printk("%s\n", name
);
624 static int my_open(struct inode
*inode
, struct file
*file
)
627 cycles_t time1
, time2
, delay
;
629 printk("** get_cycles calibration **\n");
630 cycles_calibration_min
= ULLONG_MAX
;
631 cycles_calibration_avg
= 0;
632 cycles_calibration_max
= 0;
635 for (i
= 0; i
< 10; i
++) {
637 time1
= get_cycles();
640 time2
= get_cycles();
642 delay
= time2
- time1
;
643 cycles_calibration_min
= min(cycles_calibration_min
, delay
);
644 cycles_calibration_avg
+= delay
;
645 cycles_calibration_max
= max(cycles_calibration_max
, delay
);
647 cycles_calibration_avg
/= 10;
650 printk("get_cycles takes [min,avg,max] %llu,%llu,%llu cycles, "
651 "results calibrated on avg\n",
652 cycles_calibration_min
,
653 cycles_calibration_avg
,
654 cycles_calibration_max
);
657 printk("** Single writer test, no contention **\n");
658 wbias_rwlock_profile_latency_reset();
659 writer_threads
[0] = kthread_run(writer_thread
, (void *)0,
660 "wbiasrwlock_writer");
661 BUG_ON(!writer_threads
[0]);
662 ssleep(SINGLE_WRITER_TEST_DURATION
);
663 kthread_stop(writer_threads
[0]);
666 wbias_rwlock_profile_latency_print();
668 printk("** Single trylock writer test, no contention **\n");
669 wbias_rwlock_profile_latency_reset();
670 trylock_writer_threads
[0] = kthread_run(trylock_writer_thread
,
672 "trylock_wbiasrwlock_writer");
673 BUG_ON(!trylock_writer_threads
[0]);
674 ssleep(SINGLE_WRITER_TEST_DURATION
);
675 kthread_stop(trylock_writer_threads
[0]);
678 wbias_rwlock_profile_latency_print();
680 printk("** Single preemptable reader test, no contention **\n");
681 wbias_rwlock_profile_latency_reset();
682 preader_threads
[0] = kthread_run(preader_thread
, (void *)0,
683 "wbiasrwlock_preader");
684 BUG_ON(!preader_threads
[0]);
685 ssleep(SINGLE_READER_TEST_DURATION
);
686 kthread_stop(preader_threads
[0]);
689 wbias_rwlock_profile_latency_print();
691 printk("** Single non-preemptable reader test, no contention **\n");
692 wbias_rwlock_profile_latency_reset();
693 npreader_threads
[0] = kthread_run(npreader_thread
, (void *)0,
694 "wbiasrwlock_npreader");
695 BUG_ON(!npreader_threads
[0]);
696 ssleep(SINGLE_READER_TEST_DURATION
);
697 kthread_stop(npreader_threads
[0]);
700 wbias_rwlock_profile_latency_print();
702 printk("** Multiple p/non-p readers test, no contention **\n");
703 wbias_rwlock_profile_latency_reset();
704 for (i
= 0; i
< NR_PREADERS
; i
++) {
705 printk("starting preader thread %lu\n", i
);
706 preader_threads
[i
] = kthread_run(preader_thread
, (void *)i
,
707 "wbiasrwlock_preader");
708 BUG_ON(!preader_threads
[i
]);
710 for (i
= 0; i
< NR_NPREADERS
; i
++) {
711 printk("starting npreader thread %lu\n", i
);
712 npreader_threads
[i
] = kthread_run(npreader_thread
, (void *)i
,
713 "wbiasrwlock_npreader");
714 BUG_ON(!npreader_threads
[i
]);
716 ssleep(SINGLE_READER_TEST_DURATION
);
717 for (i
= 0; i
< NR_NPREADERS
; i
++)
718 kthread_stop(npreader_threads
[i
]);
719 for (i
= 0; i
< NR_PREADERS
; i
++)
720 kthread_stop(preader_threads
[i
]);
723 wbias_rwlock_profile_latency_print();
725 printk("** High contention test **\n");
726 wbias_rwlock_profile_latency_reset();
727 perform_test("wbias-rwlock-create", wbias_rwlock_create
);
728 ssleep(TEST_DURATION
);
729 perform_test("wbias-rwlock-stop", wbias_rwlock_stop
);
731 wbias_rwlock_profile_latency_print();
737 static struct file_operations my_operations
= {
741 int init_module(void)
743 pentry
= create_proc_entry("testwbiasrwlock", 0444, NULL
);
745 pentry
->proc_fops
= &my_operations
;
747 printk("PTHREAD_ROFFSET : %lX\n", PTHREAD_ROFFSET
);
748 printk("PTHREAD_RMASK : %lX\n", PTHREAD_RMASK
);
749 printk("NPTHREAD_ROFFSET : %lX\n", NPTHREAD_ROFFSET
);
750 printk("NPTHREAD_RMASK : %lX\n", NPTHREAD_RMASK
);
751 printk("SOFTIRQ_ROFFSET : %lX\n", SOFTIRQ_ROFFSET
);
752 printk("SOFTIRQ_RMASK : %lX\n", SOFTIRQ_RMASK
);
753 printk("HARDIRQ_ROFFSET : %lX\n", HARDIRQ_ROFFSET
);
754 printk("HARDIRQ_RMASK : %lX\n", HARDIRQ_RMASK
);
755 printk("SUBSCRIBERS_WOFFSET : %lX\n", SUBSCRIBERS_WOFFSET
);
756 printk("SUBSCRIBERS_WMASK : %lX\n", SUBSCRIBERS_WMASK
);
757 printk("WRITER_MUTEX : %lX\n", WRITER_MUTEX
);
758 printk("NPTHREAD_WMASK : %lX\n", SOFTIRQ_WMASK
);
759 printk("SOFTIRQ_WMASK : %lX\n", SOFTIRQ_WMASK
);
760 printk("HARDIRQ_WMASK : %lX\n", HARDIRQ_WMASK
);
765 void cleanup_module(void)
767 remove_proc_entry("testwbiasrwlock", NULL
);
770 MODULE_LICENSE("GPL");
771 MODULE_AUTHOR("Mathieu Desnoyers");
772 MODULE_DESCRIPTION("wbias rwlock test");